i am hoping the drop in fuel presure is because i am super rich, i will know that for sure come tuesday <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> , i have the speed inc 255L inline. seems like it will pump about 55gal/hr at 60psi, thats about 330lb/hr and even at .6BSFC that should be good for 550fwhp. if im seeing 50lb/hr on my maf then from what i have read the most power i could be making right now would be around 500fwhp.

my maf with the 6psi pully tops out at 50lb/min. <img border="0" title="" alt="[Razz]" src="gr_images/icons/tongue.gif" /> i am still using the stock air box with a K&N. after looking at my logs more closely i think it may be a sensor problem. yesterday it was about 20deg when i was out loging, my IAT at idle was around 30deg, then i floor it and it would go strait to around 90deg. here is the part that makes me think it may just be the sensor, when i let off the gas but am still going 100mph it drops right back to 30deg, hmmm.

 

If you stock intank is going away then the inline will only flow what the intank puts out.

I'd want the 02's in the low 900's it's safe anything thing less and you might see knock and more more power.

Good luck, 12.9's with a truck is bad azz!

 

just looked at my fuel pump, it is a gsl392, the flow is rated at 61gal/min at 60psi at 13.5v. that should be good for at least 600fwhp unless the stock pump or lines slow it down some. if after i get my a/f ratio close i still loose presure then i will need to look for other problems like a bad intank.

 

I think John is right about the stock pump. Even though it's head pressure is zero because of the inline it still might not be pumping enough to the 392. Time to sump the tank and run two 392's in parallel. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> Either that or get the 340M pump for in the tank. It's not a direct fit but, I think red53gmc has put one in his truck. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> That and the 392 should work a little better.

John

 

how do you sump a plastic tank? <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

 

Plastic welder. <img border="0" title="" alt="[Razz]" src="gr_images/icons/tongue.gif" /> I've got one if you want to try it. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> Would some bulkhead fittings work I wonder?

Or find someone to make you up a nice aluminum sumped tank. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

John